MCD12Q2 v005

MODIS/Terra and Aqua Land Cover Dynamics Yearly L3 Global 500 m SIN Grid


PI: Mark Friedl

The MCD12Q2.005 dataset was decommissioned as of March 18, 2019. Users are encouraged to use the new improved MCD12Q2.006 dataset.

Description

The Version 5 Moderate Resolution Imaging Spectroradiometer (MODIS) Land Cover Dynamics (MCD12Q2) product (informally called the MODIS Global Vegetation Phenology product) provides estimates of the timing of vegetation phenology at global scales. Additionally, MCD12Q2 provides information related to the range and summation of the Enhanced Vegetation Index (EVI) computed from MODIS surface reflectance data at each pixel. It identifies the vegetation growth, maturity, and senescence that mark seasonal cycles. In contrast to Version 4, the newer version of MCD12Q2 uses both Terra and Aqua MODIS input data. MCD12Q2 is produced once a year with 24 months of input data (i.e., the 12 months of interest data bracketed by six month’s data on either side). The yearly MCD12Q2 products are available for 2001 through 2014.

MCD12Q2 primarily uses MODIS EVI, which is computed from the MODIS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) product instead of the MOD09 surface reflectance product. In contrast to the Version 4 product, MCD12Q2 uses NBAR values computed from an 8-day period at 500 meter (m) spatial resolution. Huete et al. (2002) provide the formula used to derive the EVI from the NBAR data. The snow and ice flag included in the MODIS NBAR product quality field is useful to filter data points associated with snow-covered surfaces from the input time series, especially because snow presence introduces large temporal variations in EVI that are not associated with vegetation phenology. Land surface temperature data inputs are derived from the MOD11A2 8-day composite products.

The following data citation is recommended when using MCD12Q2 data: Friedl, M., Gray, J., Sulla-Menashe, D. (2009). MCD12Q2 MODIS/Terra+Aqua Land Cover Dynamics Yearly L3 Global 500m SIN Grid V005 [Data set]. NASA EOSDIS Land Processes DAAC.

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Characteristics

Improvements/Changes from Previous Versions

  • The V5 Land Cover Dynamics product is produced at a higher spatial resolution (500 m) than the Version 4 product (1,000 m).
  • The V5 Land Cover Dynamics product uses both Aqua and Terra inputs.
  • The V5 Land Cover product uses NBAR values computed from an 8-day period compared to a 16-day period in the Version 4 product.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI
File Size~165 MB
Temporal ResolutionYearly
Temporal Extent2001-01-01 to 2014-12-31
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers8
Columns/Rows2400 x 2400
Pixel Size500 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Onset_Greenness_Increase Onset Greenness Increase since January 1, 2000 Day 16-bit unsigned integer 32767 N/A 0 to 32766 N/A
Onset_Greenness_Maximum Onset Greenness Maximum since January 1, 2000 Day 16-bit unsigned integer 32767 N/A 0 to 32766 N/A
Onset_Greenness_Decrease Onset Greenness Decrease since January 1, 2000 Day 16-bit unsigned integer 32767 N/A 0 to 32766 N/A
Onset_Greenness_Minimum Onset Greenness Minimum since January 1, 2000 Day 16-bit unsigned integer 32767 N/A 0 to 32766 N/A
NBAR_EVI_Onset_Greenness_Minimum NBAR EVI Onset Greenness Minimum EVI 16-bit unsigned integer 32767 N/A 0 to 10000 0.0001
NBAR_EVI_Onset_Greenness_Maximum NBAR EVI Onset Greenness Maximum EVI 16-bit unsigned integer 32767 N/A 0 to 10000 0.0001
NBAR_EVI_Area NBAR EVI Area EVI 16-bit unsigned integer 32767 N/A 0 to 32766 0.01
Dynamics_QC Dynamics Quality Control Bit Field 16-bit unsigned integer 65535 N/A 0 to 65534 N/A

Attention: The Dynamics_QC layer of the MCD12Q2 products is not performing as intended. Users are advised to ignore the quality information.

Quality Control (QC) Bit Index

Bit No. Description Quality flags for Land Cover Type
Bits 0–1 Mandatory QA 00 = Processed, good quality
Bits 0–1 Mandatory QA 01 = Processed, other quality
Bits 0–1 Mandatory QA 10 = Not processed due to clouds effects
Bits 0–1 Mandatory QA 11 = Not processed due to other effects
Bits 2–3 Quarters since last update (Not implemented) 00 = 1 quarter
Bits 2–3 Quarters since last update (Not implemented) 01 = 2 quarters
Bits 2–3 Quarters since last update (Not implemented) 10 = 3 quarters
Bits 2–3 Quarters since last update (Not implemented) 11 = 4 quarters
Bits 4–7 Land water mask 0000 = Shallow ocean
Bits 4–7 Land water mask 0001 = Land (Nothing else but land)
Bits 4–7 Land water mask 0010 = Ocean coastlines and lake shorelines
Bits 4–7 Land water mask 0011 = Shallow inland water
Bits 4–7 Land water mask 0100 = Ephemeral water
Bits 4–7 Land water mask 0101 = Deep inland water
Bits 4–7 Land water mask 0110 = Moderate or continental ocean
Bits 4–7 Land water mask 0111 = Deep ocean
Bits 8–15 Phenology Assessment 1 to 100 = Valid Values
Bits 8–15 Phenology Assessment 255 = Fill value

Known Issues

For complete information about known issues refer to the MOD12Q2 Land Cover Dynamics - Known Issues document.

Documentation

Using the Data

Tools

Citation

DOI:

About the Image

Combined MODIS Onset Greeness Maximum data from the MCD12Q2 product over the Gulf Coast, United States, 2016.

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